Not a day that gets out of hand, though I've had a few of those, but a day where you really just want to run away, and everything feels like it's too much to cope with.
I've coped with far higher workloads, enormously more stress & pressure. Sometimes though it just feels a bit overwhelming. I've come to the conclusion that work and mental exercise is very much like physical exercise, and sometimes there's a pain barrier to push through, in order to keep going. Last night I managed 2.8 miles of slow running (about 10min/mile, which is pretty pathetic, though livable for someone >50 who isn't a runner) and there was a pain barrier overcome. Today I'm faced with various tasks, and it quite literally causes internal pain to overcome my weakness and lack of drive, feelings of inadequacy and lack of ability.
But sitting around self-entertaining will do no-one any good. Need to press on.